Electric-motor starter.



G. L. GOUGHNOUR.

ELECTRIC MOTOR STARTER.

APPLIOATION FILED APR.19,1911.

1,012,198. 7 Patented Dec. 19,1911.

2 SHEETSSHEET 1.

G. L. GOUGHNOUR.

ELECTRIC MOTOR STARTER.

APPLICATION FILED APR.19,1911.

1,012,198. Patented De0.19,1911.

2 SHEETS-*SHEET 2,

' UNITED STATES PA ENT OFFICE.

CHARLES I|. GOUGHNOUR, OF CANTON, OHIO, ASSIGNOR TO THE UNITED ELECTRIC COMPANY, OF CANTON, ,OHIO, A CORPORATION OF OHIO.

ELECTRIC-MOTOR STARTER.

Specification of Letters Patent. Patented Dec. 19, 1911.

Application filed April 19, 1911. Serial No. 622,056.

advantages, are attained by the mechanism,

construction and arrangement illustrated, for a preferred embodiment of the invention, in the accompanying drawings, forming part hereof, in which-- Figure 1 is a vertical section. of an electric motor, showing the starting device thereon; Fig. 2, an enlarged section of the starting device; Fig. 3, a side elevation of the starting device; Fig. 4, a section on line 4-4, Figs. 2 and 3, showing a plan of the insulated disk; and Fig. 5, a section on line 55, Figs. 2 and 3, showing an under plan view of the insulated disk.

Similar numerals refer to similar parts throughout the drawings.

The fixed parts of the starting devices are securedin the bracket 1 mounted on the upper end of the motor case 2, in which motor case is journaled the spindle 3 of the rotor 4, and in which case is also secured the stator 5. The stem '6 of the starter is mounted in the hub 7 of the bracket 1, in co-axial alinement with the spindle 3 of the rotor; and the inner end 8 of the stem is located adjacent to and beyond the end 9 of the rotor spindle. The starter stem 6 is preferably made in the form of a bolt t aving the cylindric head 10 on the inner end and the ordinary nut 11 on the outer end;

and the fixed parts of the starter areassem bled on the bolt-stem, beginning with the collar 12 next to the cylindric head, the inner insulation washer 13 next to the collar, and then the insulation tube 14, which tube incloses the bolt stem from the inner insulation washer 13 to the outer end of the bracket hub 7. The metallic cylindric sleeve 15 is then telescoped around the inner end of the insulation tube, with its inner end against the inner insulation washer l3; and

sulating the cylindric sleeve 15. The outer insulation washer 18 is located around the bolt stem and against the outer ends of the insulation tube 14 and the bracket hub 7, and the outer terminal washer 19 is located between the outer insulation washer and the nut 11 of the bolt-stem; which terminal washer is connected with the other terminal wire 19' of the starting winding of the stator. All the fixed parts thus described and the bracket hub are securely clamped together on the bolt-stem between its head and the nut. By this construction and arrangement of the parts, it is evident that the insulated sleeve 15 is in conducting connection with one terminal wire of the starting winding and thus becomes a cylin dricterminal thereof; and that the-insulated cylindric head 10 of the bolt-stem is in conducting connection with the other terminal wire of the starting winding, and thus becomes a cylindric terminal thereof, adjacent to but insulated from the cylindric sleeve terminal; and finally that each cylindric terminal has a free external periphery.

The bracket 20 is secured on the upper end of the rotor spindle, and as shown the body of this bracket is preferably made in the form of the nut 21, screwed on the upper end 9 of the spindle; on which nut are provided the upwardly extending and preferably integral arms 22, on which arms is secured a plate as the disk 23 with the intervening insulation washer 24, as by means of the insulated bolts or rivets 25. The disk 23, thus insulated, is provided with the central aperture 26 which clears around the periphery of the fixed collar 12 of the starter.

The centrifugal dog 27 is pivoted or otherwise movably secured on the upper side of the insulated disk 23, and the centrifugal dog 28 is likewise secured on the lower side thereof, each dog having its outer end connected to the disk by means of a spring, as the coil spring 29, acting to normally hold the inner end of the dogs inward; the inner normally held against the peripheries of the cylindric terminals, the circuit of the startmg winding will be closed between these termmals through the insulated disk 23. And it is also evident that a rotation of the insu-"' lated disk 23, with the rotor spindle 3 to which it is secured, will tend to throw the inner ends of the dogs 27 and 28 outward bycentrifugal force; and, that when this force is sufiicient to overcome the action of the springs '29, the inner ends of the do will be thrown outward away from the cy ndric terminals, thus breaking or opening the starting winding circuit. When the rotor is at rest, the centrifugal dogs are held by their springs in contact with the respective cylindric terminals, thus closing the circuit in the starting windings of the stator. And when an electric current is supplied the rotor is thus started, and when asuflicient speed of the rotor is attained the centrifugal dogs are thrown out of contact with the cylindrlc terminals, thereby opening the starting circult.

I claim:

1. A centrifugal switch including a spindle, two insulated cylindric terminals with an intervening collar c o-axially fixed adjacent to and beyond the end of the spindle, an insulated disk secured on the spindle and having a central a rture clearing around the intervening co ar, and two spring-controlled centrifugal dogs on the disk normallsly contacting the the respective termina 2. A centrifugal switch including a spintrifugal dogs on the d sk normally contactmg with the respective terminals.

4. A centrifugal switch including a spindle, two insulated cylindric terminals coaxially located adjacent to and beyond the end of the spindle an insulated disk secured on the spindle, and two spring-controlled centrifugal dogs on the disk normally contacting with the respective terminals 5. A centrifugal switch including a spindle, two insulated cylindric terminals coa-xially fixed adjacent to and beyond the end of the spindle, and two spring-controlled centrifugal dogs having an insulated movable connection with the spindle and normally contacting with the external periphery of the respective terminals.

6. A centrifugal switch includin a spindle, two insulated cylindric termlnals coaxiall located adjacent to and beyond the end 0 the spindle, and two spring-mntrolled centrifugal dogs havin an insulated movable connection with t e spindle and normally contacting with the external periphery. of the res tive terminals.

HARLES L. GOUGHNOUR.

Witnesses:

RAY F. KoHL, Rum A. Mnmnn. 

